Cooling bearing

Abstract

The utility model belongs to the technical field of bearings, and particularly relates to a cooling bearing which comprises a shaft body, ball supports and fan blades which are distributed in a staggered mode are arranged on the surface of the shaft body, balls are arranged on the sides, away from the shaft body, of the ball supports, and the fan blades are arranged on the shaft body in a surrounding mode. The shaft body is sleeved with the shaft sleeve, an annular groove is formed in the inner wall of the shaft sleeve, and the balls are wrapped and clamped by the annular groove; wherein the two ends of the shaft sleeve in the length direction are provided with an air outlet and an air inlet respectively, the air outlet and the air inlet both penetrate through the inner wall of the shaft sleeve, and the air outlet and the air inlet are suitable for being externally connected with an exhaust pipe and an air conveying pipe respectively. Meanwhile, by combining the cooling cavity structure of the refrigeration ring, the internal temperature of the bearing is effectively reduced, airflow circulation is improved, cooling efficiency is improved, and the effect of prolonging the service life of the bearing is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of bearing technology, and specifically relates to a cooling bearing. Background Technology

[0002] Bearings are devices used to support rotating mechanical parts. Their application reduces friction and wear, extends equipment lifespan, and improves work efficiency. Bearings also play a crucial role in high-speed rotating, high-load, and high-precision mechanical equipment.

[0003] Currently, when bearings rotate at high speeds, the bearing rollers can overheat due to friction, leading to performance degradation, shortened bearing life, and in severe cases, even equipment failure. Existing technologies typically use air cooling to dissipate heat from bearings by blowing airflow onto the bearing surface. However, this method usually only works on the outer side of the bearing, while the bearing rollers are usually located on the inner side. Therefore, the airflow cannot directly contact the rollers, resulting in poor cooling performance. Utility Model Content

[0004] In view of this, the present invention provides a cooling bearing, the purpose of which is to improve the internal airflow circulation of the bearing, increase the cooling efficiency and extend the service life of the bearing.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A cooling bearing includes a shaft body, the surface of which is provided with staggered ball bearing supports and fan blades, the ball bearing supports having balls on the side away from the shaft body, and the fan blades being arranged in a ring around the shaft body;

[0007] A bushing is fitted onto the shaft body, and an annular groove is formed on the inner wall of the bushing, which encloses the ball.

[0008] The bushing has an air outlet and an air inlet at its two ends along its length, both of which penetrate the inner wall of the bushing. The air outlet and air inlet are respectively adapted to be connected to an exhaust pipe and an air supply pipe.

[0009] As a preferred technical solution, the height of the fan blade is less than the height of the ball bearing bracket.

[0010] Furthermore, the spiral direction of the fan blades faces the air outlet. When the shaft rotates in the working direction, the spiral surface of the fan blades generates an airflow that propels axially from the air inlet to the air outlet.

[0011] Furthermore, the diameter of the air outlet gradually decreases from the inside to the outside, while the diameter of the air inlet gradually increases from the inside to the outside. The axes of both the air outlet and the air inlet are perpendicular to the surface of the shaft.

[0012] Furthermore, a cooling ring is fitted onto the bushing, and a cooling cavity is formed inside the cooling ring. The two ends of the cooling ring along its length are respectively provided with an injection port and a drain port that communicate with the cooling cavity.

[0013] Furthermore, the cooling chamber is equipped with a cooling pipe, the two ends of which are connected to the injection port and the drainage port, respectively.

[0014] Furthermore, the cooling pipe is spirally arranged around the inner wall of the cooling chamber.

[0015] Furthermore, the cooling ring is located between the air outlet and the air inlet, and both ends of the cooling ring in the length direction are fixed to the bushing by screws.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0017] By cooperating with the air inlet and outlet ports on the shaft surface, the fan blades form a directional airflow during rotation. Combined with the cooling chamber structure of the cooling ring, this effectively reduces the internal temperature of the bearing, improves airflow circulation, and increases cooling efficiency, thus extending the service life of the bearing. Attached Figure Description

[0018] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0019] Figure 1 This is a structural schematic diagram of a cooling bearing provided by this utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the cooling cavity provided by this utility model;

[0021] Figure 3 This is a schematic diagram of a cooling bearing end structure provided by this utility model.

[0022] Shaft-1; Fan blade-2; Bushing-3; Air outlet-4; Cooling chamber-5; Air inlet-6; Liquid injection port-7; Cooling pipe-8; Drain port-9; Ball bearing bracket-10. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1: In the prior art, when a bearing operates at high speed, the internal balls rub against the ball bearing support 10, generating a large amount of heat. Traditional air cooling methods dissipate heat from the outer wall of the bearing through external airflow. However, since the balls are located in the enclosed space formed by the shaft body 1 and the bushing 3, the external airflow cannot directly contact the ball area. The heat accumulated in the ball area is difficult to dissipate effectively, causing the surface temperature of the balls to rise, accelerating the aging of the grease, and causing abnormal wear between the balls and the support.

[0025] To solve the above problems, this application provides a structure in which fan blades 2 and ball bearing brackets 10 are staggered on the surface of the shaft body 1, so that the fan blades 2 form an axial airflow when the shaft body 1 rotates. Combined with the airflow channels opened at both ends of the bushing 3, an airflow path from the air inlet 6 to the air outlet 4 is established, so that the airflow passes through the contact surface between the ball bearings and the bracket to complete the heat exchange.

[0026] Therefore, this application includes a cooling bearing consisting of a shaft body 1 and a bushing 3. The surface of the shaft body 1 is provided with staggered ball bearing supports 10 and fan blades 2. Ball bearings are located on the side of the ball bearing supports 10 away from the shaft body 1, and the fan blades 2 are arranged around the shaft body 1. The bushing 3 is fitted onto the shaft body 1, and its inner wall has an annular groove to hold the balls. At both ends of the bushing 3 along its length are respectively an air outlet 4 and an air inlet 6 penetrating the inner wall, and the air outlet 4 and air inlet 6 are respectively connected to an exhaust pipe and an air supply pipe.

[0027] Among them, the ball bearing support 10 refers to the support structure that carries the balls and is used to limit the radial displacement of the balls when the shaft 1 rotates. The fan blade 2 refers to the airflow drive component with a curved profile, which can adopt a helical blade structure. The annular groove refers to the groove surrounding the inner wall of the bushing 3, which can be formed into a continuous groove by machining, to accommodate the balls and guide the airflow along the surface of the balls.

[0028] Specifically, when the shaft 1 rotates, the fan blades 2 push the airflow from the inlet 6 into the bushing 3. The airflow flows along the annular groove over the ball bearing surface, carrying away the heat generated by friction, and is finally discharged from the outlet 4. The staggered distribution of the ball bearing support 10 and the fan blades 2 creates turbulence in the airflow within the annular groove, enhancing the heat dissipation efficiency of the ball bearing surface. The airflow channels at both ends of the bushing 3 form a unidirectional circulation path, preventing airflow from stagnating inside the bushing 3 and causing heat accumulation. The fan blades 2 being lower than the ball bearing support 10 prevents the fan blades 2 from contacting the inner wall of the bushing 3, while ensuring that the airflow is concentrated in the ball bearing contact area.

[0029] It should be noted that there are multiple ball bearing supports 10, which are arranged in a ring around the main shaft 1. There is a gap between two adjacent ball bearing supports 10, which forms an air passage.

[0030] Compared to existing technologies, traditional air-cooling solutions use an external fan to blow airflow onto the outer surface of the bearing, but the airflow cannot penetrate the sealed space between the bushing 3 and the shaft 1. This solution utilizes the rotation of the shaft 1 itself to drive the fan blades 2 to generate airflow, allowing the cooling medium to flow directly across the contact surface between the balls and the support, thus overcoming the limitations of the sealed space on the heat dissipation path.

[0031] Understandably, the height of the fan blade 2 is less than the height of the ball bearing support 10. The height of the fan blade 2 refers to the vertical distance from the top of the fan blade 2 to the surface of the shaft 1, and the height of the ball bearing support 10 refers to the vertical distance from the top of the ball bearing support 10 to the surface of the shaft 1. When the shaft 1 rotates, a height difference space is formed between the helical surface of the fan blade 2 and the ball bearing support 10, which generates an axially extending airflow channel on the surface of the shaft 1. Since the height of the ball bearing support 10 is greater than that of the fan blade 2, the airflow is confined within the channel under the rotation of the fan blade 2, preventing it from diffusing to the outside of the ball bearing support 10. At the same time, the top of the ball bearing support 10 forms a gap constraint with the inner wall of the bushing 3, causing the airflow to be guided along the side wall of the ball bearing support 10 to the ball contact area. The airflow path is limited to advancing from the air inlet 6 through the fan blade 2 area to the ball area, and finally being discharged from the air outlet 4.

[0032] It should be noted that the spiral direction of fan blade 2 faces the air outlet 4. When shaft 1 rotates in the working direction, the spiral surface of fan blade 2 generates an airflow that propels axially from air inlet 6 to air outlet 4. As fan blade 2 rotates with shaft 1, the spiral surface pushes the gas to generate a pressure difference. Since the spiral direction corresponds to the position of air outlet 4, the gas forms an axial flow that runs through air inlet 6 to air outlet 4 under the drive of the pressure difference. This flow path covers the annular groove area where the ball bearings are located, allowing cold air to flow directly over the surface of the ball bearings.

[0033] Example 2: Based on Example 1, this application further proposes that the diameter of the air outlet 4 gradually decreases from the inside to the outside, and the diameter of the air inlet 6 gradually increases from the inside to the outside, wherein the axes of the air outlet 4 and the air inlet 6 are both perpendicular to the surface of the shaft 1.

[0034] In this embodiment, when the shaft 1 rotates and drives the fan blades 2 to generate airflow, the air inlet 6 can guide the external airflow into the bearing at a higher flow rate, reducing energy loss during the intake process. The air outlet 4 accelerates the airflow discharge through cross-sectional contraction, enhancing the efficiency of hot air discharge.

[0035] Example 3: Based on Examples 1 and 2, this application further includes a cooling ring fitted on the bushing 3, with a cooling cavity 5 inside the cooling ring, and a liquid injection port 7 and a liquid discharge port 9 communicating with the cooling cavity 5 at both ends of the length direction of the cooling ring.

[0036] In this embodiment, the cooling ring is fitted around the outside of the bushing 3 and fits tightly against the surface of the bushing 3. The cooling medium enters the cooling chamber 5 through the injection port 7 and flows axially along the bushing 3, absorbing the heat generated by the friction of the balls transmitted by the bushing 3, and then is discharged through the drain port 9. The cooling medium continuously carries away heat during its flow, forming a circulating heat dissipation path. Due to the direct contact between the cooling ring and the bushing 3, heat can be quickly transferred to the cooling medium through conduction, avoiding the low cooling efficiency problem caused by the inability of airflow to directly contact the inside of the bearing in traditional air-cooling methods.

[0037] The cooling medium can be either refrigerant or water.

[0038] Furthermore, the cooling chamber 5 is equipped with a cooling pipe 8, with its two ends connected to the injection port 7 and the drain port 9, respectively. The cooling pipe 8 forms a directional flow path within the cooling chamber 5, forcing the coolant to enter from the injection port 7 and flow along the internal channel of the cooling pipe 8 to the drain port 9. The flow path of the coolant is confined within the tubular structure, avoiding flow dead zones caused by disordered diffusion. As the coolant flows through the cooling pipe 8, heat is transferred to the outside of the cooling ring through the contact area between the pipe wall and the inner wall of the bushing 3. The continuous contact surface of the pipe wall enhances the heat transfer efficiency. The spiral structure of the cooling pipe 8 increases the effective flow length of the coolant within the chamber, extending the heat exchange time.

[0039] Preferably, the cooling pipe 8 is spirally arranged around the inner wall of the cooling chamber 5. After the coolant flows into the cooling pipe 8 from the injection port 7, it flows along the spiral path through the inner wall of the cooling chamber 5. The spiral structure increases the contact time between the coolant and the inner wall of the cooling chamber 5 by extending the flow distance of the coolant, thereby improving the heat exchange efficiency. At the same time, the spiral arrangement ensures that the coolant is evenly distributed circumferentially during flow, eliminating the local high-temperature areas caused by the short path of the traditional straight cooling pipe 8. In addition, the spiral structure enhances the turbulence of the coolant through centrifugal force when the shaft 1 rotates, thus enhancing the turbulent heat transfer capacity.

[0040] Example 4: Based on Example 3, the cooling ring is located between the air outlet 4 and the air inlet 6, and both ends of the cooling ring in the length direction are fixed to the bushing 3 by screws. In this way, the refrigerant and the airflow can cooperate with each other to further improve the heat dissipation effect.

[0041] Specifically, the cooling ring is installed in the middle area between the air outlet 4 and the air inlet 6 of the bushing 3. When external airflow enters the bushing 3 from the air inlet 6, the airflow first flows through the area of ​​the cooling ring. The cooling medium in the cooling chamber 5 inside the cooling ring absorbs heat from the airflow through heat exchange. Subsequently, the cooled airflow is axially propelled to the air outlet 4 and discharged. The two ends of the cooling ring are rigidly connected to the bushing 3 by screws. When the bushing 3 rotates at high speed, the axial constraint force provided by the screws counteracts the displacement tendency caused by centrifugal force, maintaining a tight fit between the cooling ring and the bushing 3, avoiding contact failure caused by vibration or thermal expansion differences, thereby ensuring stable heat transfer between the cooling medium and the bushing 3.

[0042] Compared to existing technologies, traditional cooling bearings typically use snap-fit ​​or welding to fix the cooling ring, which is prone to loosening or breakage under high-speed rotation, leading to a decrease in cooling efficiency. This solution, however, achieves a rigid connection through screw fixing, improving structural stability and enhancing heat transfer by increasing the contact area. Furthermore, in existing technologies, the cooling ring is often located at the end of the bushing 3, causing airflow to be discharged before sufficient contact with the cooling ring. This solution places the cooling ring between the two air ports, allowing airflow to pass through the entire cooling area and optimizing the cooling path.

[0043] Through the above technical solution, this application solves the problem of positioning and fixing the cooling ring on the bushing 3. The rigid connection improves the structural stability and enhances the heat transfer efficiency. At the same time, by optimizing the position of the cooling ring, the cooling airflow can fully absorb the cooling effect of the cooling ring, realizing the synergistic cooperation between the airflow path and the cooling effect, thereby effectively reducing the temperature rise of the bearing during operation.

[0044] In summary, based on Embodiments 1 to 4, the working steps of this cooling bearing are as follows:

[0045] First, the shaft 1 begins to rotate, and the fan blades 2 rotate accordingly, pushing the external airflow into the bushing 3 through the inlet 6. Under the action of the fan blades 2, the airflow forms a directional flow, flowing along the annular groove over the surface of the balls, carrying away the heat generated by the friction between the balls and the ball bearing support 10. Simultaneously, the cooling medium inside the cooling ring circulates through the cooling chamber 5 and cooling pipe 8, absorbing the heat transferred from the bushing 3 and further reducing the internal temperature of the bearing. The airflow, after heat exchange, is discharged from the outlet 4, forming a complete cooling circulation path.

[0046] During this process, the height of fan blade 2 is lower than that of ball bearing support 10, ensuring that airflow is concentrated in the ball contact area and improving heat dissipation efficiency. The diameter of the outlet 4 gradually decreases, accelerating the discharge of hot air, while the diameter of the inlet 6 gradually increases, guiding external airflow into the bearing interior efficiently. The cooling ring is fixed to the bushing 3 by screws, maintaining a tight fit with the bushing 3 to ensure stable heat transfer.

[0047] This cooled bearing achieves effective cooling of the bearing interior by combining the fan-blade structure on the shaft surface, the airflow channel in the bushing, and the cooling chamber structure of the cooling ring. This reduces the temperature rise during bearing operation, extends the bearing's service life, and improves the overall performance of the equipment.

[0048] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0049] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cooled bearing, characterized by, The utility model relates to a kind of air cooling fan, including: Shaft body (1), the surface of the shaft body (1) is equipped with staggered distribution ball holder (10) and fan blade (2), the side of the ball holder (10) away from shaft body (1) is equipped with ball, the fan blade (2) is ringed in shaft body (1); Shaft sleeve (3), the shaft sleeve (3) is sleeved on the shaft body (1), and annular groove is opened on the inner wall of shaft sleeve (3), and the annular groove is clamped in the ball; Wherein, the length direction of the shaft sleeve (3) is equipped with gas outlet (4) and gas inlet (6) respectively, gas outlet (4) and gas inlet (6) are all through the inner wall of the shaft sleeve (3), and gas outlet (4) and gas inlet (6) are respectively adapted to external exhaust pipe and gas pipe.

2. The cooled bearing of claim 1, wherein, The height of the fan blade (2) is less than the height of the ball holder (10).

3. The cooled bearing of claim 2, wherein, The spiral direction of the fan blade (2) is towards gas outlet (4), when shaft body (1) rotates according to working direction, the spiral surface of fan blade (2) generates airflow from gas inlet (6) to gas outlet (4) axial propulsion.

4. The cooled bearing of claim 3, wherein, The caliber of the gas outlet (4) gradually decreases from inside to outside, and the caliber of the gas inlet (6) gradually increases from inside to outside, wherein the axis of the gas outlet (4) and the gas inlet (6) is perpendicular to the surface of the shaft body (1).

5. The cooled bearing of claim 1, wherein, Cooling ring is sleeved on the shaft sleeve (3), cooling cavity (5) is opened in the inside of the cooling ring, and injection port (7) and drainage port (9) are opened in the length direction of the cooling ring respectively and are communicated with cooling cavity (5).

6. The cooled bearing of claim 5, wherein, Cooling pipe (8) is arranged in the inside of the cooling cavity (5), and the both ends of the cooling pipe (8) are connected to injection port (7) and drainage port (9) respectively.

7. The cooled bearing of claim 6, wherein, The cooling pipe (8) is spirally arranged on the inner wall of the cooling cavity (5).

8. The cooled bearing of claim 5, wherein, The cooling ring is located between the gas outlet (4) and the gas inlet (6), and the both ends of the cooling ring are fixed on the shaft sleeve (3) by screw rod.

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